Answer:
0.05 cm
Explanation:
The compression of the original spring = 12 - 8.55 cm = 3.45 cm = 0.0345 m
By Hooke's law, F = ke
Where F is the applied force, k is the spring constant and e is the extension or compression. In the question, F is the weight of the car.
k = F/e = 1355 × 9.8 / 0.0345 = 384898.55 N/m
This is the spring constant of the original spring. The question mentions that the force constant of the new spring is 5855.00 N/m smaller. Hence, the force constant of the new spring is 384898.55 - 5855 = 379043.55 N/m
With the new spring installed, the compression will be
e = F/k = 1355 × 9.8 / 379043.55 = 0.035 m = 3.5 cm
The difference in the compressions of both springs = 3.5 cm - 3.45 cm = 0.05 cm
Answer:
The correct answer is option a. 400J
Explanation:
Hello!
Let's solve this!
To know if the work is positive or negative we have to know the following:
The work is positive when the gas performs (expansion)
The work is negative when done outside on the gas (compression)
In this case the work is done by the gas, so it is positive.
The correct answer is option a. 400J
Answer:
Explanation:
Given data
At d₁=4.5×10¹⁰m the speed of comet is Vi=9.2×10⁴m/s
At d₂=6×10¹²m the speed will Vf
The work done by surrounding is zero and the energy of system at the initial state equal the energy at final state so we can apply:
Substitute the given values to find final velocity Vf
So
Answer:
Friction force is 0.1375 N
Solution:
As per the question:
Radius of the metal disc, R = 4.0 cm = 0.04 m
Magnetic field, B = 1.25 T
Current, I = 5.5 A
Force on a current carrying conductor in a magnetic field is given by considering it on a differential element:
Integrating the above eqn:
(1)
Now the torque is given by:
(2)
From eqn (1) and (2):
Thus the Frictional force is given by:
Answer:
La profesora Fernanda da 452.381 mililitros de agua fresca a cada estudiante.
Explanation:
Sabemos que un litro equivale a 1000 mililitros, inicialmente obtenemos la capacidad de cada hielera al dividir la capacidad completa por el total de hieleras:
Si sabemos que cada hielera es utilizada por 7 estudiantes, entonces obtenemos la capacidad asignada a cada uno al dividir la capacidad de la hielera por el número de estudiantes:
La profesora Fernanda da 452.381 mililitros de agua fresca a cada estudiante.